I once owned a used 1974 Chevrolet Caprice that had transmission issues in 1984. It cost me around $2,500.00 to get it fixed by AAMCO. Needless to say but the fellow, who was in charge of the shop, said that the transmission should have it's fluid/filter changed on a regular basis to prevent...
2000 Nissan Frontier
Out: M1 5W-30, OEM Filter
In: M1 5W-30, OEM Filter
Miles on Vehicle: 161,712
Miles on Oil: 12,917
Time on Oil: 12 Months
Make up Oil: None
For me, if ethanol is not mixed into the unleaded gasoline, my miles per gallon will increase to around 27-30 miles per gallon from barely 22 miles per gallon in my Nissan. It may even reduce my cost per gallon and my stops at the gas station to fill up.